A simple and template-free one-pot solvothermal method is developed to grow hierarchical mesoporous Li 3 VO 4 (HM-Li 3 VO 4 ) on graphene oxide (GO). The growth of nutshell-shaped Li 3 VO 4 on GO with nutshell sizes ranging from 2 micrometres to sub-micrometre levels and a multimodal mesopore hierarchy lead to enhanced electrical and ionic conductivity of HM-Li 3 VO 4 -GO as compared to that of HM-Li 3 VO 4 or non-porous solid-state prepared Li 3 VO 4 alone. The composite material shows a charge capacity of 559 mAh g −1 at 0.1 C for the first cycle and a discharge capacity of 414 mAh g −1 at 0.5 C in the second cycle between 0.2 and 3 V. Furthermore, discharge capacity of 374 mAh g −1 achieved at 0.5 C in the fifth cycle is comparable or superior to those reported for other Li 3 VO 4 samples with similar carbon contents. The superior anode performance is attributed to its mesopore hierarchy and attachment with GO.

中文翻译：

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在 GO 上原位生长的分层介孔 Li3VO4 作为可行的锂离子电池负极材料

开发了一种简单且无模板的单锅溶剂热法，以在氧化石墨烯 (GO) 上生长分级介孔 Li 3 VO 4 (HM-Li 3 VO 4 )。果壳状的 Li 3 VO 4 在 GO 上生长，果壳尺寸从 2 微米到亚微米级不等，并且具有多模态介孔层次结构，导致 HM-Li 3 VO 4 -GO 的电导率和离子电导率高于 HM-Li 3 VO 4 -GO HM-Li 3 VO 4 或单独制备的无孔固态Li 3 VO 4 。该复合材料在 0.1 C 下第一次循环的充电容量为 559 mAh g -1，第二次循环中 0.5 C 下的放电容量为 414 mAh g -1，在 0.2 和 3 V 之间。此外，放电容量为 374 mAh在第五个循环中在 0.5 C 下实现的 g -1 与其他具有相似碳含量的 Li 3 VO 4 样品报告的那些相当或更好。